I have a 2000 Catalina 34 with a universal 35b. I am going to be replacing the heat exchanger and the exhaust elbow. Does anyone have any recommendation's on where to purchase the two parts?
Catalina Direct sells a SS one for $650. Others have built their own DIY out of black iron plumbing parts which is no doubt cheaper but some work involved. I went the CD route for ease of sourcing and semi-painless install.
https://www.catalinadirect.com/shop-by-boat/catalina-34/engine/exhaust-system/exhaust-riser-c-34-late-b-series-engines/?SearchResults=1
They also sell Heat Exchangers but you might get a better deal from SeaKamp through
https://www.go2marine.com/Universal-Medalist-Replacement-Heat-Exchanger-3-Dia-x-17-5-8-OALfits-M35B-M25XPB-201027
How long have you had the SS elbow in for? Any issues or all good?
One year. Works great! I also have a Seakamp 3 in. HX for 7 years. Flushed it once last year with lime-away. It also works great.
For Seakamp talk to Clark (360) 734-2788
p/n - 201027CN
They basically give theirs a rattle can painting that can let corrosion underneath/cause the paint to blister at the hose connections. It can benefit from a couple coats of high-quality, oil-based enamel, like Rustoleum. Order a few replacement cover gaskets and they also carry the anodes (if you use zinc.)
good info, thank you
Quote from: Noah on December 04, 2023, 09:32:55 PM
One year. Works great! I also have a Seakamp 3 in. HX for 7 years. Flushed it once last year with lime-away. It also works great.
Thanks for the info. I have a few more questions. I am going to be doing a exhaust upgrade and just working through everything i need and how to do it.
What is the year of your vessel?
For the exhaust elbow, what additional parts did you need. I am pretty sure i need this flange for the elbow:
https://www.catalinadirect.com/shop-by-boat/catalina-350/engine/exhaust-system/engine-exhaust-flange-circular-quotbquot-series-engine/?SearchResults=1
Not sure if i need to get this:https://www.catalinadirect.com/shop-by-boat/catalina-350/engine/exhaust-system/engine-exhaust-flange-female-circular-quotbquot-series-engine/?SearchResults=1
what approach did you take with the aqua lift muffler?
I am not the guy to give you specifics on your 35B motor. I have an M25XP. Not sure what you mean "what was your approach with Aqualift muffler"? My original muffler is doing fine. Do install a hump hose.
Tom : I'm familiar with the flange, exhaust riser and hump hose / aqualift muffler, but what is the "exhaust elbow" that you refer to??
A thought
Ron,
I'm pretty sure he means exhaust riser. Some people get the terminology wrong, because Yanmars have elbows, not Universals.
Quote from: Noah on December 09, 2023, 12:33:19 PM
I am not the guy to give you specifics on your 35B motor. I have an M25XP. Not sure what you mean "what was your approach with Aqualift muffler"? My original muffler is doing fine. Do install a hump hose.
What i meant by what approach did you take with your aqual lift muffler is did you use a hump hose or do anything non standard. Recent post that i saw was unsinging 2 hump hose and a fiberglass elbow. Sounds like you should used a hump hose.
Quote from: Ron Hill on December 09, 2023, 01:49:20 PM
Tom : I'm familiar with the flange, exhaust riser and hump hose / aqualift muffler, but what is the "exhaust elbow" that you refer to??
A thought
I meant exhaust riser.
https://www.catalinadirect.com/shop-by-boat/catalina-34/engine/exhaust-system/exhaust-riser-c-34-late-b-series-engines/
Quote from: tomsoyer on December 09, 2023, 07:23:03 PM
What i meant by what approach did you take with your aqual lift muffler is did you use a hump hose or do anything non standard. Recent post that i saw was unsinging 2 hump hose and a fiberglass elbow. Sounds like you should used a hump hose.
Hump hose should go on the inlet of the muffler - it's the hose from the end of the exhaust riser from the engine; his helps remove vibration from the riser to the hose to the muffler intake port.
The outlet is usually just exhaust hose because it has enough room and doesn't have vibration so it doesn't need a hump hose. If someone did it to connect to a fiberglass elbow, it's just an elegant but unnecessary solution to a physical arrangement issue.
Tom : The Hump hose is installed between the exhaust riser and the muffler to protect the inlet muffler collar from the engine vibrations (which over time WILL crack that fiberglass inlet collar!!! ) :cry4`
A thought
Quote from: Ron Hill on December 10, 2023, 01:00:59 PM
Tom : The Hump hose is installed between the exhaust riser and the muffler to protect the inlet muffler collar from the engine vibrations (which over time WILL crack that fiberglass inlet collar!!! ) :cry4`
A thought
Thanks, i will definitely be adding a hump hose.
Quote from: tomsoyer on December 09, 2023, 07:23:03 PM
Quote from: Noah on December 09, 2023, 12:33:19 PM
I am not the guy to give you specifics on your 35B motor. I have an M25XP. Not sure what you mean "what was your approach with Aqualift muffler"? My original muffler is doing fine. Do install a hump hose.
2 hump hose and a fiberglass elbow. Sounds like you should used a hump hose.
Tom
If you're referring to a specific installation please post a link to it or a photo of what you're referring to.
Help is help you.
Perhaps the owner had installed a different muffler or had to change sizes (e.g., 2" to 1-5/8" hose) and used a fiberglass adapter. Or, used a silicone exhausr hose but not a "hump" hose.
Hi Tom,
I recently (last spring) made the same repairs after mine corroded through at the exhaust nipple (most common point of failure on these, I think). After a lot of looking around and comparison, I found that having a local welder fabricate the riser was much less expensive than getting one from CD (that did include shipping to BC, so may be less to ship somewhere in the US, but that may still be a cost factor). He was able to size and replicate the riser, no problem.
Other parts I bought included the flange, flange gasket (not shown in the photo), hump hose, thermal wrap, and misc new hoses and clamps.
Cost to fabricate the riser was about $450 CAD, and the whole project was about $850 CAD. Bottom line was that, at least for me, having the riser fabricated by a local welder was well worth it. Hope that helps.
I may have posted these before in this thread, they are in my 101 Topics:
Muffler & Exhaust Riser Replacement 101 (2015 Tech Note with Tips & Tricks)
https://c34.org/muffler-exhaust-riser-replacement-2015/
Westerbeke Nipple Source https://www.westerbeke.com/Product/NIPPLE/299693
Quote from: KWKloeber on December 10, 2023, 11:47:52 PM
Quote from: tomsoyer on December 09, 2023, 07:23:03 PM
Quote from: Noah on December 09, 2023, 12:33:19 PM
I am not the guy to give you specifics on your 35B motor. I have an M25XP. Not sure what you mean "what was your approach with Aqualift muffler"? My original muffler is doing fine. Do install a hump hose.
2 hump hose and a fiberglass elbow. Sounds like you should used a hump hose.
Tom
If you're referring to a specific installation please post a link to it or a photo of what you're referring to.
Help is help you.
Perhaps the owner had installed a different muffler or had to change sizes (e.g., 2" to 1-5/8" hose) and used a fiberglass adapter. Or, used a silicone exhausr hose but not a "hump" hose.
Ken,
I think the post Tom was referring to was this one showing a fibreglass elbow joining two hump hoses:
https://c34.org/bbs/index.php/topic,11848.msg96302.html#msg96302 (https://c34.org/bbs/index.php/topic,11848.msg96302.html#msg96302)
Tom,
Here's how I replaced my hump hose. I have an M35Ac in my Mk1.5 C34 but I think this part is fairly common on most C34s.
https://c34.org/bbs/index.php/topic,6878.msg45884.html#msg45884 (https://c34.org/bbs/index.php/topic,6878.msg45884.html#msg45884)
Guys : Toms ' installation riser is slightly different because he has an M35B engine. It appears that the M35A engine has the same muffler (top entry/exhaust) as the M25/M25XP engines.
The M35B muffler has side entry/exhaust ports!! He can use the shorter hump hose!!
A few thoughts
Quote from: Dave Spencer on December 11, 2023, 12:15:31 PM
Quote from: KWKloeber on December 10, 2023, 11:47:52 PM
Quote from: tomsoyer on December 09, 2023, 07:23:03 PM
Quote from: Noah on December 09, 2023, 12:33:19 PM
I am not the guy to give you specifics on your 35B motor. I have an M25XP. Not sure what you mean "what was your approach with Aqualift muffler"? My original muffler is doing fine. Do install a hump hose.
2 hump hose and a fiberglass elbow. Sounds like you should used a hump hose.
Tom
If you're referring to a specific installation please post a link to it or a photo of what you're referring to.
Help is help you.
Perhaps the owner had installed a different muffler or had to change sizes (e.g., 2" to 1-5/8" hose) and used a fiberglass adapter. Or, used a silicone exhausr hose but not a "hump" hose.
Ken,
I think the post Tom was referring to was this one showing a fibreglass elbow joining two hump hoses:
https://c34.org/bbs/index.php/topic,11848.msg96302.html#msg96302 (https://c34.org/bbs/index.php/topic,11848.msg96302.html#msg96302)
Tom,
Here's how I replaced my hump hose. I have an M35Ac in my Mk1.5 C34 but I think this part is fairly common on most C34s.
https://c34.org/bbs/index.php/topic,6878.msg45884.html#msg45884 (https://c34.org/bbs/index.php/topic,6878.msg45884.html#msg45884)
Dave/Tom
Ah hahhh. Thanks.
Yep, context says it all!!
That was unnecessarily complicated, but of course it worked. Being the long length of hose between the riser (looks like a Westerbeke exhaust elbow?) and the muffler, two hump hoses was overkill/unnecessarily expense. Indeed, he could have used 1-5/8" silicone exhaust hose in a gentle sweep, which is way soft enough compared to the hard wire-reinforced hose he replaced, to absorb engine vibration. The cost would have been about half the way it was done and K.I.S.S.
-Ken
Tom : I'm not familiar with what kind of hose that Catalina used as a 5/8" hose from the anti-syphon valve to the nipple inlet on the M35B riser?? If they used a wire reinforced hose CHANGE it to a nylon hose!!! Wire reinforced Hose is Toooo stiff!!! That way the engine vibrations are NOT transmitted to that nipple weld with a softer nylon reinforced hose - because engine vibrations will fatigue the weld and eventually cause a crack / leak.
A thought
Thank you all for the valuable feed back. I really appreciate the help.
I am going to go with a Catalina direct exhaust riser and a Sea Kamp heat exchanger. Heat exchanger came today in the mail. Only took a day to get it after ordering, and I am supposed to get the riser tomorrow. Hopefully I will be able to start on the project this weekend!
Ron,
the hose currently on the nipple is:
https://www.fisheriessupply.com/sierra-series-250-shieldsflex-ii-marine-water-exhaust-hose
which i was planning on replacing with the same thing. Did you have other hose recommendations?
Tom : I went to the site you posted and here's what I found:
SIERRA SERIES 250
Series 250 Shieldsflex II Water/Exhaust Hose
Shieldsflex II Marine Water/Exhaust Hose - 3/4"
SKU: 09482 Item ID: SIE 116-250-0340
Premium Wired Exhaust Hose
Meets or exceeds standards
Cut lengths non returnable
What you want from the anti syphon valve to the nipple is a plan old nylon reinforced water heater hose!! Go to an auto parts store and get a Gates brand heater hose and use that!!
A thought
Let's not make this complicated.
TOM, what you want is not series 250 hose with wire, you want series 200 hose that does not have wire. Or silicone hose (which is without wire) from someplace mail-order like HPS Silicone hoses.
Tom : I'm sure that "Gates" hose from your auto parts store is one of the lowest cost good brands of heater hose - and it does the job!!
A thought